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Why is a rotary hammer drill more effective than a conventional electric drill when making holes in concrete or masonry?

A. It accepts masonry or rotary hammer bits.
B. It can be operated for longer periods without causing fatigue.
C. It creates smaller diameter holes.
D. It combines rotation with hammer action to cut faster.

Answer :

Final answer:

A rotary hammer drill is more effective for drilling into concrete or masonry due to its combination of rotation and hammer action, allowing for faster penetration. It accepts specialized masonry bits designed for tougher materials and often reduces fatigue during extended use. This dual mechanism makes it particularly efficient compared to conventional electric drills.


Explanation:

Why a Rotary Hammer Drill is More Effective

A rotary hammer drill is specifically designed for drilling into hard materials like concrete and masonry, making it more effective than a conventional electric drill for such tasks. The primary advantage lies in its mechanism, which combines rotation with hammer action. This dual-action process allows the drill to break through tough surfaces much faster than just rotational drilling alone.

Key Features of Rotary Hammer Drills

  1. Hammer Action: The hammering mechanism generates rapid impacts that crack the concrete as the drill bit rotates. This method is efficient in penetrating dense and solid materials.
  2. Accepts Specialized Bits: Rotary hammer drills use specific masonry or rotary hammer bits that are designed to withstand the high impact and provide better durability during drilling.
  3. Fatigue Reduction: The design of rotary hammer drills often allows for better ergonomics and handling, which can contribute to reducing operator fatigue during longer use.

While both types of drills can create holes, the combination of rotation and hammer action in a rotary hammer drill makes it ideal for larger and more challenging tasks in masonry and concrete applications.


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